Walter Mars

For the smaller 1920s nine-cylinder engine, see Walter Mars I.

Mars
Walter Mars 14 M
Type	Radial aero engine
National origin	Czechoslovakia
Manufacturer	Walter Aircraft Engines

The Walter Mars was a Czechoslovakian 14-cylinder, air-cooled radial engine for powering aircraft, a licensed built Gnome-Rhône 14M.[1]

Applications

• Focke-Wulf Fw 189[2] Note. 204 of these airplanes were produced in the Aero Praha factory during the war.[3]

Engines on display

A preserved example of the Walter Mars engine is on display at the following museum:

• Prague Aviation Museum, Kbely

Specifications (Mars)

Data from Letectvi, 1937.[4]

General characteristics

• Type: 14-cylinder two-row radial piston engine
• Bore: 122 mm (4.8 in)
• Stroke: 116 mm (4.6 in)
• Displacement: 18.98 L (1,158 cu in)
• Length: 1,282 mm (50.5 in)
• Diameter: 964 mm (38.0 in)
• Dry weight: 420 kg (930 lb)

Components

• Valvetrain: One intake and one exhaust valve per cylinder
• Fuel system: Carburettor
• Fuel type: Petrol
• Cooling system: Air-cooled

Performance

• Power output: 700 hp (520 kW) at 3,030 rpm
• Specific power: 27.3 KW/L
• Compression ratio: 6.5:1
• Power-to-weight ratio: 1.23 KW/Kg

See also

Related lists

• List of aircraft engines

References

1. Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2nd ed.). Cambridge, England: Patrick Stephens Limited. p. 174. ISBN 978-1-85260-163-8.
2. Bundesarchiv/Militärarchiv Freiburg, Produktionsprogramme (german)
3. Smith, J Richard; Kay, Anthony (1978) [1972], German Aircraft of the Second World War (third impression ed.),p. 172, London: Putnam & Co, ISBN 0-370-00024-2.
4. Letectvi 1937, Volume 17 (in Czech) Retrieved: 30 September 2019